GitHub Action中Cypress环境变量为空致测试失败求助

向TestBranch分支发起Pull Request时，Cypress测试无法正常运行，核心问题是环境变量RESOLUTION为空：

• 测试第一步依赖该变量获取分辨率，但执行echo ${{ vars.RESOLUTION }}无任何输出
• 触发测试错误：

CypressError: cy.viewport() can only accept a string preset or a width and height as numbers.

附上当前GitHub Action配置：

name: Cypress Tests

run-name: ${{ github.actor }} is running Cypress tests 🚀
on:
  pull_request:
    branches:
      - TestBranch
  workflow_dispatch:
jobs:
  cypress-run:
    runs-on: ubuntu-latest

    steps:
      # Install Node.js
      - name: Use Node.js 20.x
        uses: actions/setup-node@v3
        with:
          node-version: '20.x'
        # checkout code
      - name: Checkout
        uses: actions/checkout@v4

      - name: Echo environment variable
        run: echo "The environment variable is ${{ vars.RESOLUTION }}"

        # run tests
      - name: Cypress run
        uses: cypress-io/github-action@v5
        with:
          working-directory: .
        env: 
          DEBUG: '@cypress/github-action'
          AUTH_DOMAIN: ${{ vars.AUTH_DOMAIN }}
          EMAIL: ${{ vars.EMAIL }}
          EMAIL2: ${{ vars.EMAIL2 }}
          ORGNAME: ${{ vars.ORGNAME }}
          PASSWORD2: ${{ secrets.PASSWORD2 }}
          RESOLUTION: ${{ vars.RESOLUTION }}
          STAGINGENVIRONMENT: ${{ vars.STAGINGENVIRONMENT }}

• 确认变量配置存在：检查仓库的「Settings → Secrets and variables → Actions」页面，确认RESOLUTION变量已正确创建，且值格式符合要求（比如1920x1080这类自定义分辨率，或macbook-16这类Cypress预设字符串）
• 检查变量权限范围：如果是组织级变量，需确认该变量的「Repository access」设置包含当前仓库；仓库级变量默认对PR触发的Workflow可读，若有特殊权限限制需解除
• 验证测试代码的变量读取方式：Cypress会将Workflow中env字段的变量注入到Cypress.env()中，测试代码需通过Cypress.env('RESOLUTION')获取，而非直接读取process.env.RESOLUTION
• 处理分辨率格式：如果变量值是宽x高格式的字符串，需在测试代码中拆分并转换为数字后传入cy.viewport()，示例代码：

  const [width, height] = Cypress.env('RESOLUTION').split('x');
  cy.viewport(parseInt(width), parseInt(height));
  

• 增加调试步骤：在Cypress run步骤前添加打印所有环境变量的命令，确认变量是否被正确加载：

  - name: Print all environment variables
    run: printenv
  

内容的提问来源于stack exchange，提问作者Ryan